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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?> | |
3 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
4 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
5 | ||
6 | <!-- | |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2010 Lennart Poettering | |
10 | ||
11 | systemd is free software; you can redistribute it and/or modify it | |
12 | under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | systemd is distributed in the hope that it will be useful, but | |
17 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
23 | --> | |
24 | ||
25 | <refentry id="systemd.socket"> | |
26 | <refentryinfo> | |
27 | <title>systemd.socket</title> | |
28 | <productname>systemd</productname> | |
29 | ||
30 | <authorgroup> | |
31 | <author> | |
32 | <contrib>Developer</contrib> | |
33 | <firstname>Lennart</firstname> | |
34 | <surname>Poettering</surname> | |
35 | <email>lennart@poettering.net</email> | |
36 | </author> | |
37 | </authorgroup> | |
38 | </refentryinfo> | |
39 | ||
40 | <refmeta> | |
41 | <refentrytitle>systemd.socket</refentrytitle> | |
42 | <manvolnum>5</manvolnum> | |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
46 | <refname>systemd.socket</refname> | |
47 | <refpurpose>systemd socket configuration files</refpurpose> | |
48 | </refnamediv> | |
49 | ||
50 | <refsynopsisdiv> | |
51 | <para><filename>systemd.socket</filename></para> | |
52 | </refsynopsisdiv> | |
53 | ||
54 | <refsect1> | |
55 | <title>Description</title> | |
56 | ||
65232ea7 LP |
57 | <para>A unit configuration file whose name ends in |
58 | <filename>.socket</filename> encodes information about | |
59 | an IPC or network socket or a file system FIFO | |
60 | controlled and supervised by systemd, for socket-based | |
61 | activation.</para> | |
1f812fea LP |
62 | |
63 | <para>This man page lists the configuration options | |
64 | specific to this unit type. See | |
65 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
66 | for the common options of all unit configuration | |
67 | files. The common configuration items are configured | |
68 | in the generic [Unit] and [Install] sections. The | |
cdb788e4 | 69 | socket specific configuration options are configured |
1f812fea LP |
70 | in the [Socket] section.</para> |
71 | ||
72 | <para>Additional options are listed in | |
ba60f905 LP |
73 | <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
74 | which define the execution environment the | |
75 | <option>ExecStartPre=</option>, | |
76 | <option>ExecStartPost=</option>, | |
77 | <option>ExecStopPre=</option> and | |
78 | <option>ExecStoptPost=</option> commands are executed | |
79 | in.</para> | |
1f812fea | 80 | |
65232ea7 LP |
81 | <para>For each socket file a matching service file |
82 | (see | |
83 | <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
84 | for details) must exist, describing the service to | |
85 | start on incoming traffic on the socket. Depending on | |
b439c6ee | 86 | the setting of <option>Accept=</option> (see below), |
65232ea7 LP |
87 | this must either be named like the socket unit, but |
88 | with the suffix replaced; or it must be a template | |
89 | file named the same way. Example: a socket file | |
1f812fea LP |
90 | <filename>foo.socket</filename> needs a matching |
91 | service <filename>foo.service</filename> if | |
92 | <option>Accept=false</option> is set. If | |
93 | <option>Accept=true</option> is set a service template | |
94 | file <filename>foo@.service</filename> must exist from | |
95 | which services are instantiated for each incoming | |
96 | connection.</para> | |
65232ea7 | 97 | |
62adf224 LP |
98 | <para>Unless <varname>DefaultDependencies=</varname> |
99 | is set to <option>false</option>, socket units will | |
100 | implicitly have dependencies of type | |
101 | <varname>Requires=</varname> and | |
102 | <varname>After=</varname> on | |
103 | <filename>sysinit.target</filename> as well as | |
104 | dependencies of type <varname>Conflicts=</varname> and | |
105 | <varname>Before=</varname> on | |
106 | <filename>shutdown.target</filename>. These ensure | |
107 | that socket units pull in basic system | |
108 | initialization, and are terminated cleanly prior to | |
109 | system shutdown. Only sockets involved with early | |
110 | boot or late system shutdown should disable this | |
111 | option.</para> | |
112 | ||
65232ea7 | 113 | <para>Socket units may be used to implement on-demand |
b439c6ee | 114 | starting of services, as well as parallelized starting |
65232ea7 | 115 | of services.</para> |
1f812fea LP |
116 | </refsect1> |
117 | ||
118 | <refsect1> | |
119 | <title>Options</title> | |
120 | ||
121 | <para>Socket files must include a [Socket] section, | |
122 | which carries information about the socket or FIFO it | |
123 | supervises. A number of options that may be used in | |
124 | this section are shared with other unit types. These | |
125 | options are documented in | |
126 | <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The | |
65232ea7 | 127 | options specific to the [Socket] section of socket |
1f812fea LP |
128 | units are the following:</para> |
129 | ||
130 | <variablelist> | |
131 | <varlistentry> | |
132 | <term><varname>ListenStream=</varname></term> | |
133 | <term><varname>ListenDatagram=</varname></term> | |
134 | <term><varname>ListenSequentialPacket=</varname></term> | |
135 | <listitem><para>Specifies an address | |
136 | to listen on for a stream | |
137 | (SOCK_STREAM), datagram (SOCK_DGRAM) | |
138 | resp. sequential packet | |
139 | (SOCK_SEQPACKET) socket. The address | |
140 | can be written in various formats:</para> | |
141 | ||
142 | <para>If the address starts with a | |
143 | slash (/), it is read as file system | |
144 | socket in the AF_UNIX socket | |
145 | family.</para> | |
146 | ||
147 | <para>If the address starts with an | |
148 | ampersand (@) it is read as abstract | |
149 | namespace socket in the AF_UNIX | |
150 | family. The @ is replaced with a NUL | |
151 | character before binding. For details | |
152 | see | |
153 | <citerefentry><refentrytitle>unix</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para> | |
154 | ||
155 | <para>If the address string is a | |
156 | single number it is read as port | |
157 | number to listen on for both IPv4 and | |
158 | IPv6.</para> | |
159 | ||
160 | <para>If the address string is a | |
161 | string in the format v.w.x.y:z it is | |
162 | read as IPv4 specifier for listening | |
163 | on an address v.w.x.y on a port | |
164 | z.</para> | |
165 | ||
166 | <para>If the address string is a | |
167 | string in the format [x]:y it is read | |
168 | as IPv6 address x on a port y.</para> | |
169 | ||
170 | <para>Note that SOCK_SEQPACKET | |
171 | (i.e. <varname>ListenSequentialPacket=</varname>) | |
172 | is only available for AF_UNIX | |
173 | sockets. SOCK_STREAM | |
174 | (i.e. <varname>ListenStream=</varname>) | |
175 | when used for IP sockets refers to TCP | |
176 | sockets, SOCK_DGRAM | |
177 | (i.e. <varname>ListenDatagram=</varname>) | |
178 | to UDP.</para> | |
179 | ||
180 | <para>These options may be specified | |
181 | more than once in which case incoming | |
182 | traffic on any of the sockets will trigger | |
183 | service activation, and all listed | |
184 | sockets will be passed to the service, | |
185 | regardless whether there is incoming | |
186 | traffic on them or not.</para> | |
187 | ||
b439c6ee | 188 | <para>If an IP address is used here, it |
1f812fea LP |
189 | is often desirable to listen on it |
190 | before the interface it is configured | |
191 | on is up and running, and even | |
192 | regardless whether it will be up and | |
193 | running ever at all. To deal with this it is | |
194 | recommended to set the | |
195 | <varname>FreeBind=</varname> option | |
196 | described below.</para></listitem> | |
197 | </varlistentry> | |
198 | ||
199 | <varlistentry> | |
200 | <term><varname>ListenFIFO=</varname></term> | |
201 | <listitem><para>Specifies a file | |
202 | system FIFO to listen on. This expects | |
203 | an absolute file system path as | |
204 | argument. Behaviour otherwise is very | |
205 | similar to the | |
206 | <varname>ListenDatagram=</varname> | |
207 | directive above.</para></listitem> | |
208 | </varlistentry> | |
209 | ||
210 | <varlistentry> | |
211 | <term><varname>BindIPv6Only=</varname></term> | |
212 | <listitem><para>Takes a one of | |
213 | <option>default</option>, | |
214 | <option>both</option> or | |
215 | <option>ipv6-only</option>. Controls | |
216 | the IPV6_V6ONLY socket option (see | |
217 | <citerefentry><refentrytitle>ipv6</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
218 | for details). If | |
219 | <option>both</option>, IPv6 sockets | |
220 | bound will be accessible via both IPv4 | |
221 | and IPv6. If | |
222 | <option>ipv6-only</option>, they will | |
223 | be accessible via IPv6 only. If | |
224 | <option>default</option> (which is the | |
225 | default, surprise!) the system wide | |
226 | default setting is used, as controlled | |
227 | by | |
228 | <filename>/proc/sys/net/ipv6/bindv6only</filename>.</para> | |
229 | </listitem> | |
230 | </varlistentry> | |
231 | ||
232 | <varlistentry> | |
233 | <term><varname>Backlog=</varname></term> | |
234 | <listitem><para>Takes an unsigned | |
235 | integer argument. Specifies the number | |
236 | of connections to queue that have not | |
237 | been accepted yet. This setting | |
238 | matters only for stream and sequential | |
239 | packet sockets. See | |
240 | <citerefentry><refentrytitle>listen</refentrytitle><manvolnum>2</manvolnum></citerefentry> | |
241 | for details. Defaults to SOMAXCONN | |
242 | (128).</para></listitem> | |
243 | </varlistentry> | |
244 | ||
245 | <varlistentry> | |
246 | <term><varname>BindToDevice=</varname></term> | |
247 | <listitem><para>Specifies a network | |
248 | interface name to bind this socket | |
249 | to. If set traffic will only be | |
250 | accepted from the specified network | |
251 | interfaces. This controls the | |
252 | SO_BINDTODEVICE socket option (see | |
253 | <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
b439c6ee | 254 | for details). If this option is used, |
1f812fea LP |
255 | an automatic dependency from this |
256 | socket unit on the network interface | |
257 | device unit | |
258 | (<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
259 | is created.</para></listitem> | |
260 | </varlistentry> | |
261 | ||
262 | <varlistentry> | |
263 | <term><varname>DirectoryMode=</varname></term> | |
264 | <listitem><para>If listening on a file | |
b439c6ee | 265 | system socket of FIFO, the parent |
1f812fea LP |
266 | directories are automatically created |
267 | if needed. This option specifies the | |
268 | file system access mode used when | |
dd1eb43b LP |
269 | creating these directories. Takes an |
270 | access mode in octal | |
271 | notation. Defaults to | |
272 | 0755.</para></listitem> | |
1f812fea LP |
273 | </varlistentry> |
274 | ||
275 | <varlistentry> | |
276 | <term><varname>SocketMode=</varname></term> | |
277 | <listitem><para>If listening on a file | |
b439c6ee | 278 | system socket of FIFO, this option |
1f812fea LP |
279 | specifies the file system access mode |
280 | used when creating the file | |
dd1eb43b LP |
281 | node. Takes an access mode in octal |
282 | notation. Defaults to | |
1f812fea LP |
283 | 0666.</para></listitem> |
284 | </varlistentry> | |
285 | ||
286 | <varlistentry> | |
287 | <term><varname>Accept=</varname></term> | |
288 | <listitem><para>Takes a boolean | |
b439c6ee | 289 | argument. If true, a service instance |
1f812fea LP |
290 | is spawned for each incoming |
291 | connection and only the connection | |
b439c6ee | 292 | socket is passed to it. If false, all |
1f812fea LP |
293 | listening sockets themselves are |
294 | passed to the started service unit, | |
295 | and only one service unit is spawned | |
296 | for all connections (also see | |
297 | above). This value is ignored for | |
298 | datagram sockets and FIFOs where | |
b439c6ee | 299 | a single service unit unconditionally |
1f812fea LP |
300 | handles all incoming traffic. Defaults |
301 | to <option>false</option>. For | |
b439c6ee | 302 | performance reasons, it is recommended |
1f812fea LP |
303 | to write new daemons only in a way |
304 | that is suitable for | |
305 | <option>Accept=false</option>. This | |
306 | option is mostly useful to allow | |
307 | daemons designed for usage with | |
b439c6ee KS |
308 | <citerefentry><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
309 | to work unmodified with systemd socket | |
1f812fea LP |
310 | activation.</para></listitem> |
311 | </varlistentry> | |
312 | ||
313 | <varlistentry> | |
314 | <term><varname>MaxConnections=</varname></term> | |
315 | <listitem><para>The maximum number of | |
316 | connections to simultaneously run | |
317 | services instances for, when | |
318 | <option>Accept=true</option> is | |
319 | set. If more concurrent connections | |
b439c6ee | 320 | are coming in, they will be refused |
1f812fea LP |
321 | until at least one existing connection |
322 | is terminated. This setting has no | |
323 | effect for sockets configured with | |
324 | <option>Accept=no</option> or datagram | |
325 | sockets. Defaults to | |
326 | 64.</para></listitem> | |
327 | </varlistentry> | |
328 | ||
329 | <varlistentry> | |
330 | <term><varname>KeepAlive=</varname></term> | |
331 | <listitem><para>Takes a boolean | |
332 | argument. If true, the TCP/IP stack | |
333 | will send a keep alive message after | |
334 | 2h (depending on the configuration of | |
335 | <filename>/proc/sys/net/ipv4/tcp_keepalive_time</filename>) | |
336 | for all TCP streams accepted on this | |
337 | socket. This controls the SO_KEEPALIVE | |
338 | socket option (see | |
339 | <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
340 | and the <ulink | |
341 | url="http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/">TCP | |
342 | Keepalive HOWTO</ulink> for details.) | |
343 | Defaults to | |
344 | <option>false</option>.</para></listitem> | |
345 | </varlistentry> | |
346 | ||
347 | <varlistentry> | |
348 | <term><varname>Priority=</varname></term> | |
349 | <listitem><para>Takes an integer | |
350 | argument controlling the priority for | |
351 | all traffic sent from this | |
352 | socket. This controls the SO_PRIORITY | |
353 | socket option (see | |
354 | <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
355 | for details.).</para></listitem> | |
356 | </varlistentry> | |
357 | ||
358 | <varlistentry> | |
359 | <term><varname>ReceiveBuffer=</varname></term> | |
360 | <term><varname>SendBuffer=</varname></term> | |
361 | <listitem><para>Takes an integer | |
362 | argument controlling the receive | |
363 | resp. send buffer sizes of this | |
364 | socket. This controls the SO_RCVBUF | |
365 | resp. SO_SNDBUF socket options (see | |
366 | <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
367 | for details.).</para></listitem> | |
368 | </varlistentry> | |
369 | ||
370 | <varlistentry> | |
371 | <term><varname>IPTOS=</varname></term> | |
372 | <listitem><para>Takes an integer | |
373 | argument controlling the IP | |
374 | Type-Of-Service field for packets | |
375 | generated from this socket. This | |
376 | controls the IP_TOS socket option (see | |
377 | <citerefentry><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
378 | for details.). Either a numeric string | |
379 | or one of <option>low-delay</option>, | |
380 | <option>throughput</option>, | |
381 | <option>reliability</option> or | |
382 | <option>low-cost</option> may be | |
383 | specified.</para></listitem> | |
384 | </varlistentry> | |
385 | ||
386 | <varlistentry> | |
387 | <term><varname>IPTTL=</varname></term> | |
388 | <listitem><para>Takes an integer | |
389 | argument controlling the IPv4 | |
390 | Time-To-Live/IPv6 Hop-Count field for | |
391 | packets generated from this | |
392 | socket. This sets the | |
393 | IP_TTL/IPV6_UNICAST_HOPS socket | |
394 | options (see | |
395 | <citerefentry><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
396 | and | |
397 | <citerefentry><refentrytitle>ipv6</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
398 | for details.)</para></listitem> | |
399 | </varlistentry> | |
400 | ||
401 | <varlistentry> | |
402 | <term><varname>Mark=</varname></term> | |
403 | <listitem><para>Takes an integer | |
404 | value. Controls the firewall mark of | |
405 | packets generated by this socket. This | |
406 | can be used in the firewall logic to | |
407 | filter packets from this socket. This | |
408 | sets the SO_MARK socket option. See | |
409 | <citerefentry><refentrytitle>iptables</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
410 | for details.</para></listitem> | |
411 | </varlistentry> | |
412 | ||
413 | <varlistentry> | |
414 | <term><varname>PipeSize=</varname></term> | |
415 | <listitem><para>Takes an integer | |
416 | value. Controls the pipe buffer size | |
417 | of FIFOs configured in this socket | |
418 | unit. See | |
419 | <citerefentry><refentrytitle>fcntl</refentrytitle><manvolnum>2</manvolnum></citerefentry> | |
420 | for details.</para></listitem> | |
421 | </varlistentry> | |
422 | ||
423 | <varlistentry> | |
424 | <term><varname>FreeBind=</varname></term> | |
425 | <listitem><para>Takes a boolean | |
426 | value. Controls whether the socket can | |
427 | be bound to non-local IP | |
428 | addresses. This is useful to configure | |
429 | sockets listening on specific IP | |
430 | addresses before those IP addresses | |
431 | are successfully configured on a | |
432 | network interface. This sets the | |
433 | IP_FREEBIND socket option. For | |
434 | robustness reasons it is recommended | |
435 | to use this option whenever you bind a | |
436 | socket to a specific IP | |
437 | address. Defaults to <option>false</option>.</para></listitem> | |
438 | </varlistentry> | |
439 | ||
cebf8b20 TT |
440 | <varlistentry> |
441 | <term><varname>TCPCongestion=</varname></term> | |
442 | <listitem><para>Takes a string | |
443 | value. Controls the TCP congestion | |
444 | algorithm used by this socket. Should | |
445 | be one of "westwood", "veno", "cubic", | |
446 | "lp" or any other available algorithm | |
447 | supported by the IP stack. This | |
448 | setting applies only to stream | |
449 | sockets.</para></listitem> | |
450 | </varlistentry> | |
451 | ||
1f812fea LP |
452 | <varlistentry> |
453 | <term><varname>ExecStartPre=</varname></term> | |
454 | <term><varname>ExecStartPost=</varname></term> | |
b3eaa628 LP |
455 | <listitem><para>Takes one or more |
456 | command lines, which are executed | |
457 | before (resp. after) the listening | |
458 | sockets/FIFOs are created and | |
1f812fea LP |
459 | bound. The first token of the command |
460 | line must be an absolute file name, | |
461 | then followed by arguments for the | |
b3eaa628 LP |
462 | process. Multiple command lines may be |
463 | specified following the same scheme as | |
464 | used for | |
465 | <varname>ExecStartPre=</varname> of | |
466 | service unit files.</para></listitem> | |
1f812fea LP |
467 | </varlistentry> |
468 | ||
469 | <varlistentry> | |
470 | <term><varname>ExecStopPre=</varname></term> | |
471 | <term><varname>ExecStopPost=</varname></term> | |
472 | <listitem><para>Additional commands | |
473 | that are executed before (resp. after) | |
474 | the listening sockets/FIFOs are closed | |
b3eaa628 LP |
475 | and removed. Multiple command lines |
476 | may be specified following the same | |
477 | scheme as used for | |
478 | <varname>ExecStartPre=</varname> of | |
479 | service unit files.</para></listitem> | |
1f812fea LP |
480 | </varlistentry> |
481 | ||
1f812fea LP |
482 | <varlistentry> |
483 | <term><varname>TimeoutSec=</varname></term> | |
484 | <listitem><para>Configures the time to | |
485 | wait for the commands specified in | |
486 | <varname>ExecStartPre=</varname>, | |
487 | <varname>ExecStartPost=</varname>, | |
488 | <varname>ExecStopPre=</varname> and | |
489 | <varname>ExecStopPost=</varname> to | |
b439c6ee KS |
490 | finish. If a command does not exit |
491 | within the configured time, the socket | |
1f812fea | 492 | will be considered failed and be shut |
b439c6ee | 493 | down again. All commands still running, |
1f812fea LP |
494 | will be terminated forcibly via |
495 | SIGTERM, and after another delay of | |
496 | this time with SIGKILL. (See | |
cdb788e4 | 497 | <option>KillMode=</option> below.) |
1f812fea LP |
498 | Takes a unit-less value in seconds, or |
499 | a time span value such as "5min | |
500 | 20s". Pass 0 to disable the timeout | |
501 | logic. Defaults to | |
502 | 60s.</para></listitem> | |
503 | </varlistentry> | |
504 | ||
1f812fea LP |
505 | <varlistentry> |
506 | <term><varname>KillMode=</varname></term> | |
507 | <listitem><para>Specifies how | |
cdb788e4 | 508 | processes of this socket unit shall be |
1f812fea LP |
509 | killed. One of |
510 | <option>control-group</option>, | |
511 | <option>process-group</option>, | |
512 | <option>process</option>, | |
513 | <option>none</option>.</para> | |
514 | ||
515 | <para>This option is mostly equivalent | |
516 | to the <option>KillMode=</option> | |
517 | option of service files. See | |
518 | <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
519 | for details.</para></listitem> | |
520 | </varlistentry> | |
d9ff321a | 521 | |
2292707d LP |
522 | <varlistentry> |
523 | <term><varname>KillSignal=</varname></term> | |
524 | <listitem><para>Specifies which signal | |
525 | to use when killing a process of this | |
526 | socket. Defaults to SIGTERM. | |
527 | </para></listitem> | |
528 | </varlistentry> | |
529 | ||
ba035df2 LP |
530 | <varlistentry> |
531 | <term><varname>SendSIGKILL=</varname></term> | |
532 | <listitem><para>Specifies whether to | |
533 | send SIGKILL to remaining processes | |
534 | after a timeout, if the normal | |
535 | shutdown procedure left processes of | |
536 | the socket around. Takes a boolean | |
537 | value. Defaults to "yes". | |
538 | </para></listitem> | |
539 | </varlistentry> | |
540 | ||
d9ff321a LP |
541 | <varlistentry> |
542 | <term><varname>Service=</varname></term> | |
543 | <listitem><para>Specifies the service | |
544 | unit name to activate on incoming | |
545 | traffic. This defaults to the service | |
546 | that bears the same name as the socket | |
547 | (ignoring the different suffixes). In | |
548 | most cases it should not be necessary | |
549 | to use this option.</para></listitem> | |
550 | </varlistentry> | |
551 | ||
1f812fea LP |
552 | </variablelist> |
553 | </refsect1> | |
554 | ||
555 | <refsect1> | |
556 | <title>See Also</title> | |
557 | <para> | |
f3e219a2 | 558 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
1f812fea LP |
559 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
560 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
561 | <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
562 | <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
563 | </para> | |
564 | </refsect1> | |
565 | ||
566 | </refentry> |